Fix wrong signature
Addresses #28
Fix resource collection

Update resource collection handling to conform to latest spec
Fix request getting trashed

Use underlying request instead of creating a new one. The old logic
would throw away all the parameters, etc, that had been assigned to the
request.
Add AddResource
Add MergeData
Add CreateMany
Add HasErrors
If exists, use first error

Don't overwrite the error with a "missing response hash" error
Remove unreachable code
go fmt
Add HasDeltas
Fix sign string in test
Make sure deltas exist before attempting merge
Merged develop and updated code to v1.1 of API